Mounting for segmental wheels



Dec. 21 1926. 1,611,352

T. LARSSONY MOUNTlNG FOR SEGMENTAL WHEELS Filed Oct. 29, 1924 WITNESSES \Nvimfj R Uhure dfiarsson ATTORN the use r references in Patented Dec. 21, 1926.

THURE LARSSON, 0F WORCESTER, PANY, OF WORCESTER, MASSAGE MASSACHUSETTS, ASSIGNOR TO USETTS, A CORPORATION OF MASSACHUSETTS.

MOUN TING FOR SEGMEN 'IAL WHEELS.

Application filed October 29, 1924- scrial No. 746,696.

My invention relates to grinding wheels of the ring or cylinder type which are used for plane surface grinding.

Herefofore, abrasive rings for plane surface grinding have been cemented in a ring support or fastened thereto by cumbersome devices. For certain grinding operations,

f segments instead of a solid ring is preferred, and even greater jdifliculties than those met in fastenin an abrasive ring in place are encountere in providing a satisfactory mounting for the spaced seg ments. If the abrasive segments are cemented in place, difliculties are encountered in removing them from the ring when worn out or when breakage occurs. If fastened removably in place, there is a. danger oftheir becoming loosened from the setting.

It is accordingly one object'of my invention to provide a simple, and economically manufactured constructionwhich will hold the segments on a driving ring so as to insure the maximum wear with onesetting thereof, and articularly to mount the seg ments in sue a manner that they may be easily removed and replaced.-

With this and other objects in view as ill be apparent toone skilled in the art, my invention resides in the combination-of parts setforthin the specification and covered by the claims appended hereto.

\ Referring to the drawings, in which like dicate like partsi Figure 1 is a sectional view on the line 11 of Fig. 2 of a driving ring having abrasive segments mounted thereon; and

Fig. 2 is. a plan view showing the arran ement of the segments and their fastening evices. v

In accordance with my invention, I propose to employ abrasive segments suitably shaped for mounting on a metal ring and to hold them firmly in place between an annular flange on the ring and a set of adjustable blocks which clamp the segments against the ring. 7 Referring to the drawings, I have illustrated one embodiment of my invention comprising a driving head, fashioned as a metal ring 10 which is adapted to be fastened by set screws 11 passing through a flange 12 fixed on the driving spindle13 of a grinding machine. In order that abrasive segments may be fastened to this ring, I provide the ring '10 with a depending annular flange 14.

A set of abrading s egments 15 are disposed around the ring 10 and arranged to be held 1n place against the locating flange 14. The flange is narrow and the segments project below the same for performing the grinding operation and only so much of' the segment is hidden behind the. flange as is considered necessary for clamping it in place.

I propose to clamp the segmentsa ainst th s flange by means of adjustable bloc s arranged to contact with the inside of the segments. \Vhile various expedients may be employed for preventing removal of the segments after they have been clamped, I prefer to form the segments with enlarged heads or under cut surfaces against which the clamping blocks may be secured. As illustrated, the segments 15 may be provided with enlarged wedge shaped heads 16, and the flange 14 may be suitably provided with an inwardly projecting portion or face '17, which may be accomplished by bending the flange inwardly, so that the flange wlll fit against the outer faces 18 of the segments.-

The inner faces 19 of the segments are engaged by clamping blocks 20 which are, also so shaped and arranged as to'fit thereagainst. These blocks 20 may be adjustably positioned by means of screw threaded belts or cap. screws 21' which pass through the spaces between ad acent ends of the segments and through the ring 10. The screws slope in the direction illustrated so that any pressure on the clamping blocks caused by tightening the screws will be transmitted to the surfaces '19 of the segments in such a direction as to force the segments against the NORTON CON- outer flange and the'undcr surface 22 of the ring. Each block, as illustrated, laps over the .endsof two ad'acent segments, thereby givinggreater free om in adjustingthe segments in place. The flange 14 and the clamping blocks20 may each be provided with facings 23 and 2. respectively of soft metal, such as lead, where they contact with the abrasive segments and thereby reduce the liability of fracture when subjected to cx-' cessivepressure.

It will now be apparent that I ha've pro.

vided' a simple means of ,fastening abrasive I segments to a ring or chuck and'tha-t old segments may be readily taken out and new ones inserted. This construction may be quickly assembled and it will not require any of the operators time for adjustments. The

ters Patent is:

abrasive segments are clamped against fixed parts of the driving head, i; e. the flange 14 and the under side 22 of the head, thereby insuring rigidity of structure and that the se 'ments will be correctly located.

aving thusrdescribed my invention, what I claim as new. and desire to secure by Let- 1. An abrasive wheel comprising a rotatahle driving head having an annular flange, aplurality of abrasive segments having enlarged heads thereon, and clamping blocks adjustably mounted on said head and ar ranged to wedge the segments against said flan e and head and reniovably fasten them rigi lg in position. v I

2. n abrasive wheel comprising a rotatable driving head having a flange provided with an inwardly inclined surface, a plurality of abrasive segments having wedge the driving head to wedge the segments 1n position against the head and flange.

Signed at \Vorcester, Massachusetts, this 27th day of October, 1924.,

A i THURE LARSSON.

sides of adjacent pairs of segments and bolts 

